/Engine/Source/Runtime/Engine/Classes/Components/ModelComponent.h
Calculate the lightmap resolution to be used by the given surface.
void GetSurfaceLightMapResolution ( int32 SurfaceIndex, int32 QualityScale, int32 & Width, int32 & Height, FMatrix & WorldToMap, [TArray](API\Runtime\Core\Containers\TArray)< int32 > * GatheredNodes ) const